/*
	vis.h

	PVS/PHS generation tool

	Copyright (C) 1996-1997  Id Software, Inc.
	Copyright (C) 2002 Colin Thompson

	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

	See the GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to:

		Free Software Foundation, Inc.
		59 Temple Place - Suite 330
		Boston, MA  02111-1307, USA

	$Id$
*/

#ifndef __vis_h
#define __vis_h

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#ifdef HAVE_PTHREAD_H
#include <pthread.h>
extern pthread_mutex_t *my_mutex;
#define	LOCK	do {if (options.threads > 1) pthread_mutex_lock (my_mutex); } while (0)
#define	UNLOCK	do {if (options.threads > 1) pthread_mutex_unlock (my_mutex); } while (0)
#else
#define	LOCK
#define	UNLOCK
#endif

#define	MAX_PORTALS				32768
#define	PORTALFILE				"PRT1"
#define	PORTALFILE_AM			"PRT1-AM"
#define	ON_EPSILON				0.1
#define MAX_POINTS_ON_WINDING	64
#define	MAX_PORTALS_ON_CLUSTER	128

typedef struct {
	qboolean    original;	// don't free, it's part of the portal
	int	        numpoints;
	vec3_t      points[8];	// variable sized
} winding_t;

typedef enum { 
	stat_none, 
	stat_selected,
	stat_working, 
	stat_done 
} vstatus_t;

typedef struct {
	plane_t     plane;		// normal pointing into neighbor
	int         cluster;	// neighbor
	winding_t  *winding;
	vstatus_t   status;
	byte       *visbits;
	byte       *mightsee;
	int         nummightsee;
	int         numcansee;
} portal_t;

typedef struct seperating_plane_s {
	struct seperating_plane_s *next;
	plane_t     plane;		// from portal is on positive side
} sep_t;

typedef struct passage_s {
	struct passage_s *next;
	int         from, to;	// cluster numbers
	sep_t      *planes;
} passage_t;

typedef struct cluster_s {
	int         numportals;
	passage_t  *passages;
	portal_t   *portals[MAX_PORTALS_ON_CLUSTER];
	int         visofs;
} cluster_t;

typedef struct pstack_s {
	struct pstack_s *next;
	cluster_t  *cluster;
	portal_t   *portal;		// portal exiting
	winding_t  *source, *pass;
	plane_t     portalplane;
	byte       *mightsee;	// bit string
} pstack_t;

typedef struct {
	byte       *clustervis;	// bit string
	portal_t   *base;
	pstack_t    pstack_head;
} threaddata_t;

extern int numportals;
extern int portalclusters;
extern int numrealleafs;
extern int c_portaltest;
extern int c_portalpass;
extern int c_portalcheck;
extern int bitbytes;
extern int bitbytes_l;
extern int bitlongs;
extern struct bsp_s *bsp;

extern portal_t *portals;
extern cluster_t *clusters;
extern int *leafcluster;
extern byte *uncompressed;

extern int c_chains;
extern int c_mighttest;
extern int c_vistest;

void FreeWinding (winding_t *w);
winding_t *NewWinding (int points);
winding_t *ClipWinding (winding_t *in, plane_t *split, qboolean keepon);
winding_t *CopyWinding (winding_t *w);

void ClusterFlow (int clusternum);
void BasePortalVis (void);
void PortalFlow (portal_t *portal);
void CalcAmbientSounds (void);

#endif// __vis_h